2 or more notes at a time with LIVE.GRID or LIVE.STEP

Im messing around making a probability based drum machine and I just wondering if its possible to get more than one notes triggered at the same time with live.grid or live.step objects, in a sort of ‘polyphonic mode’ i suppose.

I can get the results I want with [matrix] or a series of [itable]‘s but I would ideally the graphics/grid that the live objects provide to make drum programming easier.